Just over 850 Medals of Honor have been awarded to US service personnel since the beginning of WWII. 616 of these were awarded posthumously.
On October 26, 1944 Fifty-five Japanese pilots attempted Kamikaze attacks in the face of incredible fire. 5 US and Australian ships were sunk. Over the next few months over 2000 planes made such attacks.
In Mogadishu, on the afternoon of October 3, 1993 during Operation Gothic Serpent, 100s of the 2-4000 Somali Militia, especially those of the Habar Gedir clan stood up to the US Army Ranger and Delta Task Force. Many of these militia had been chewing Khat, a euphoric drug related to amphetamines which causes one to be a bit braver than one normally would be. Many of these boys stood in the street firing AK-47s and RPGs at the US troops, even while M2 .50 cals and various US small arms were mowing them down. I've personally had to take down people drugged out of their mind on Methamphetamines, cocaine, and other stimuli.
Conclusion drawn - Under extraordinary circumstances (Heroic sacrifice of self for others), or when guided by certain mindsets (Kamikaze & Fedayeen), or when influenced by chemicals (Habar Gedir militia and drug-criminals) sometimes, no matter how much hot lead is sent down range, not everyone will be suppressed. But, with enough lead, everyone can be stopped dead.